Gas-engine.



PATENTED UGT. 9, 1906.

` R. HARTWIG.

GAS ENGINE. APPLICATION FILED IBB. 25, i904,v

. ever,

' each sponding junction C.

'outlet-valve E.

gear.

RUDCLFAHARTWG, OF RTTENSCHEID,'NEAR FSSiCN-CN-THE-RUHR,

GERMANY, ASSIGNOR TO. FRlED.

KRUPP AKTENGFSELLSCH AFT,

0F ESSEN-ON-THE-RUHR-- GERMANY.

GASENGiNE.

Specification of Letters Patent. l Application filed FebruaryI 25. 1904. Serial No. 195,239.

Patented Oct'. Q, i906.

The disadvantage of this arrangement, howis that the outlet-valves are with difficulty accessible, and in addition di'liculties arise in `the uniform cooling of the cylindercovers or ends, and it not infrequently happ ens that they split, 'owing to unequal expansion.

Now this invention therefore is designed to provide a valve-gear which shall not possess the disadvantages above'c'ited. The desired end is attained substantially by placing all the inlet and exhaust valves upon the back of the cylinder.

In the accompanying drawings is shown, by Way of exam le, an application of the invention to the i etand outlet valves of a doubleacting four-stroke cycle-engine.

Figure l is a vertical longitudinal section through the cylinder and valve-chests, and Fig-2 is a cross-section on the line 27,2 of Fig. 1. Fig. 3 is a section on the line 8 3 of Fig. l.

The Working cylinder A, which is surrounded bythe cylinder-jacket B, has at each end its back ,a flanged junction a. U on of these junctions is mounted a va vechest C of trough shape and having a corre- At the other end the ests are provided With ribs c2, Which bear against the ribs a? of the cylinder, but are not rigidly connected thereto, so that the chests C can expand freely relative to the cylinder lduring uctuations of temperature. Above, the chests C. are closed,` With the exception of the openings for one inlet-valve D and one The valve-seats are placed in special boxes D and E', secured to the chests C and carrying the unions and valve- The cylinder-jacket B reaches tof. the valve-boxes D E', and thus forms a space upon Which surrounds the chest C and in which the cooling-Water can completely surround the chest C, so :that no excessive rise ofy teniperature need be feared at any'point.

The above invention. is obviously applicable to single-acting engines.

Havin now particularly described and ascertaine the nature of my sai invention and in what ymanner the same is to be `performed, l declare that What l claim is# l. The combination with the cylinder and the Water-jacket for the same, of a valvechest supported on the cylinder to permit relative expansive movement between the chest and the cylinder and located Within the Water-jacket of the cylinder so that Water in said jacket will directly surround and contact With the Wall of the valve-chest. 2. The combination of the Working cylinder having a iianged junction, a Water-j acket surroundmg-the Working cylinder and extending above the iangedjunction, and a valvechest spaced from the yWalls of and sup orted Within vthe Water-j acket and upon 'the anged junction in such a manner as to permit relative expansive movement between the chest and the cylinder.

3. kThe combination of the Working cylinder having a rib and a flanged junctioma Water-jacket surrounding the Working cylinder and extending above the flanged junction and the rib, and a valve-chest provided with a rib and ai'langed junction. supported respectively on the rib and the flanged junction of the Working cylinder in such a manner as to permit relative ex ansive movement between the chest and t e cylinder and located Within but spaced lfrom the Walls of the Waterjacket.

4. rlhe combination with the cylinder, and the Water-jacket, of a valve-chest having its Walls of a single thickness, supported Within the Water jacket upon the cylinder and spaced from all of the other Walls of said jacket so asto be exposed to. the Water of the. jacket on the outside of its Walls.

The foregoing specification signed at Dsseldorf, Germany, this 26th day of January,

RUDOLF HARTWG. ln presence of- WILLIAM EssENWEIN, PETER LIEBER. 

